Hydraulic lift for vehicles



Mardi 7, 1933. c. J. BRISTOL HYDRAULIC LIFT FOR VEHICLES Filed Dec. l5, 1930 Patented Mar. 7, l1933 Unirse srarss PATENT ,FFFICE CYRUS J'. BRISTOL, OF DES MOINES, IOWA, ASSIGNOR TO GLOBE MACHINERY COMPANY, F DES 'TIIO'INES, XOWA, A CORPORATION OF OWA HYDRAULIC LIFT ron VEHICLES,

Application led December 15, 1939. Serial No. 502,436. I Y

The object of this invention is to provide an improved vehicle lift of simple, durable and inexpensive construction which is particularly adapted to lift large vehicles such as buses and the like, and to provide a-pair of lifting elements, one at each end of the vehicle supporting track; and in connection therewith improved means for connecting the tracks to the lift members whereby sliding and pivotal connections may be maintained between the lift heads and the track members, and at the same time maintain the stability and equilibrium of the track members.

This invention consists in the construction, arrangement and combination of the various parts of the device, whereby the objects contemplated are attained, as hereinafter more fully set forth, pointed out in my claim, and illustrated in the accompanying drawing, in which:

Figure 1 shows a side elevation of my improved lift. .Y

Figure 2 shows a top view of one end of the lift.

Figure 3 shows a detail sectional view taken on the line 3-3 of Figure 2. s

In the drawing I have used the reference numerals 10 and 11 to indicate upright cylinders spaced apart a considerable distance, and of the ordinary construction adapted to employ oil or similar fluid for operating the piston 12 mounted in each of the cylin-` ders. Each piston carries a lift rod l-slidably mounted therein. Y

The upper end of each of the lift rods 13 is provided with a head 14 whichis preferably constru'cted of structural steel, having side members 15 and end members 16. A plate 17 is secured to the top edges of the members 15 and 16, said plate being substantially diamond shaped, as illustrated in Figure 2.

The upper ends of the lift rods 13 are provided with notches or openings 18 for` receiving a shaft 19. Each end of the shaft 19 has a downwardly and outwardly extend-v ing portion 20 terminating in a horizontally extending portion 21. The members 21 are designed to project through openings 22 in the end members 16.

`Said plates are supported cured tothe The head 14 is rigidly connected with the upper end of the member 13 by welding, so that said head and the shaft 19 are permanently fixed to the lift rod. The upper end of the'tubular lift rod 13 is provided with a cover plate 23 rod.

.& SUPPLY for closing the end of the Pivotally mounted on eachof the outwardl ly extendingportions 21 of the shaftv 19 is a bar 24 having a slot'25 for'receiving the mem-1l vbers 21. Each of the bars 24 preferably comprise an -b'eam 26 and aV pair of Vplates 27.

between the ianges of said -beams `in the manner clearly i illustrated in Figure'.V The slots 25 are in the plates 27 as well as the web of the I-beams 26. Secure-d to each set of corresponding ends of the bars 24 is parallel with the. shaft 19 and of a length substantially equal to the tread of the wheel base of the vehicle to be carried by the lift.

The corresponding end of each set of beams 28 is provided with a channel shaped wardly. .The track members are rigidly sebeams by suitable rivets 31 or by welding. I Y

By this arrangement it will be seen that the bars 24, the crossbeams 28 and the track members V29 form a rigid frame member. Each end of the frame ispivotally connected t0 a corresponding lift head by means of its corresponding shaft 19, and at the same time provides means whereby one end lof the track may be elevated above the other if so desired.

vrlhe shafty19 provides a pivot for permita I beam 28 f mounted Y track'29 having flanges 30 projecting up-v ses ting'the track members to assume an an ffular "b position relative to the ground surface.

The slots 25 provide means wherebyfthe shafts may move longitudinally of the track members as one end of the track member is elevated to accommodate the increase in the it will be seen that the track members of the supporting frame will be supported against swinging about a central longitudinal axis extending through the upper ends of the lift rods, while means is provide-d whereby either end of the track may be elevated or lowered with respect to the other, without any great tendency toward the upper ends of the lift rods being pulled together.V

Suitable means not illustrated herein, but illustrated and described in a (3o-pending application, is provided for supplying pow-er equally to the pistons l2, or whereby either en-d of the track may be elevated relative to the other end.

I claim as my invention:

A lift device comprising two track mem-` bers space-d apart, two lift devices one under each end portion of the track members, each liftv device including` a vertically movable rod, a hea-d rigidly secured to each rod, a

shaft iXed to each head with'its ends pro-k jecting beyond the head, means for connecting` said shafts to the said track` members` said means comprising two spaced apart beams one on each side of the hea-d, said beams being rigidly secured to the track members, and two spaced apart bars fixed to said beams formed with longitudinal slots through Vwhich the ends of the said shafts are extended, for the purposes stated.

` CYRUS J. BRISTOL. 

